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March 27, 1928. 1,663,678

R. w. BYERLY FIRE EXTINGUI SHER Filed Feb. 23. 1922 Patented Mar. 27, 1928.

intatte ROBERT W. BYERLY, OF NEW YORK, N. Y.

FIRE EXTINGUISHER.

Application filed February 23, 1922.

This invention relates to `lire extinguishers. and has for an object to provide a simple, reliable fire extinguisher containing a tire extinguishing liquid which is maintained always under pressure so that it niay be projected upon a lire by the mere opening ot' a valve.

In accordance with the invention a body ot tire extinguishing liquid, which is pret'- erably carbon tetrachloride or a liquid containing carbon tetrachloride. is enclosed within a closed container which itcompletely fills. All or a part of the container is made of flexible sheet material and so itormed that the internal volume of the coutainer may be varied by a bending of this iiexible sheet material. Resilient means are providedto exert pressure on the outer surtace of the container tending to cause a reduction in the volume of the container, and the lbody of lire extinguishing liquid within the container' is thus maintained constantly under pressure. Since the variation in the volume of the container is obtained by bending ot the Container ot parts thereof, the container may be made of sheet material which. while flexible` is substantially inextensible and uncontractable, such as, for example, 'flexible sheet metal.

The container is preferably given such a form that its internal volume may be reduced. by a bending of the material of which the container is made, to substantially zero, and the external resilient means are most desirably so formedthat they exert a sub stanti al pressure against the container when its volume is reduced to zero. As a result, substantially all the liquid in the container is ejected when an outlet in the container is opened, and pressure upon the liquid is maintained throughout the emptying ot the container.

Other objects and advantages of the invention are hereinafter pointed out in con-l nection with a description of an extinguisher embodying the invention which is shown in the accompanying drawings and a method of making this extinguisher which also ernbodies the invention. In the drawings Fig. l is a top view and Fig. 2 a side view ot the completed extinguisher;

Fig. 3 is a vside view ot the external springs showing them in their normal form;

Fig. 4 is a sectional view taken on the line A-B of Fig. l and showing the'form of the Serial No.

pieces ol? which the container is made, before the pressing operation;

Fig. 5 is a sectional view taken on the line .NMR olt Fig. l4 and showing the container after the pressing operation and after the springs have been applied thereto; Fig. G is a section on the line A-B of Fig. l, showing :ind illustrating the completed extinguisher the torni ot the container and springsl atter the container has been filled; andr Fig. 7 is a the valve.

detailed sectional view showing The container| of the extinguisher illustrated is made trom two circular pieces 10,

Q0 of sheet metal. tory material 'toi' them.

@heet brass is a satisfac- A valve is secured to one ot the pieces l0, Q0. or between the tivo pieces, and this is most desirabl)T done bc'lore the container is formed.

As best seen in Fig. 7. 'the valve 28 has a body Q9 comprising a disc-shaped portion having a tlat upper surface and a tubular` portion 3l extending upwardly from the center ot the disc-shaped port-ion. The tubular portion 3l is externally threaded. The body Q9 of the valve is provided with a een# tral bore, the inner portion of which forms a conical valve seat SQ while the outer portion is internallythreaded. The inner member 34 ot the valve includes a hollow stem portion 35 and a solid portion 36 which has a conical valve surface corresponding to the conical valve seat 32. The inner portion ot the valve stem 35 isv externallv threaded and screwed into the threaded portion 33 of the bore of the valve body Q9.

Lateral openings 37 are provided near the inner end of the valve stein 35.

The here oi the valve stem is tornied to provide a nozzle 38 at its outer end. The outer the valve stein vided with an surlace ot the outer end of is most desirably pro-- external screw thread 39,

the valve stem.

A handle 40 may be ap- While it plied to the valve stein between its two threaded portions.

ln order to provide for the insertion ot a valve of the type illustrated, one ot the pieces ot sheet material, tor. example, the piece l0 is provided at its center with a hole 13. litter the valve 28 with the exception of the handle 40, which is applied later, has been assembled, the tubular portion 3l of the valve body 29 is inserted in the hole 13 of the piece l0, while the top oi" the disoshaped portion 30 ot' the valve body is secured to the portion of the piece lO which surrounds the hole 13 by brazing, spot welding or otherwise. The posit-ion ot the valve 28 in the piece `l0 is illustrated in Fig. 4l.

The container is toi-med from the pieces l0 and 2O shown in F ig. 4 by a single pressing operation. In this pressing operation corresponding concentric corrugations ll, 2l are 'formed in the pieces l0, 20, while the outermost portions 12, 22 ot the two-pieces are crimped together so `that the two pieces are united about their peripheries and torin a container of Zero volume which is illustrated in Fig. 5. Il desired, the two pieces may be secured together about their periph-` eries by welding instead of crimping, or by both means, yor in other known manner.

The next step in makingthe extinguisher consists in applying to the container the external springs 50, 5l, 60, 6l. rllhe normal forni ol these springs is illustrated in Fig. 3. lt will be noted that the springs are normally curved and that the outer end ot each spring` is turned over to forni the eyes 52, 62. Each of the springs 50, 60 is provided near its center with an olset portion 53, 63 adapted to lit over the springs 5l, 6l respectively` when thetwo springs of each set are assembled so as to cross each other at right angles. The .springs 50, 5l each contain at their center a hole-of substantially the same diameter as that of the tubular portion 3l ot the valve body 29.

ritter the container .has been given the form illustratedfin Fig. 5, the springs 50, 5l are placed on top o the container with their convex sides inward, and the tubular portion 3l of the valve body` is inserted in the holes in these springs. The springs are then firmly secured to the container by a nut 55 which yisscrewed upon the tubular portion 3l. The springs-60, 61 are placed below the container with their convex. sides inward. Means may be provided :for securing the center ot' these springs to the centerV ot the container, but such means have been found unnecessary. The position of the twosets of springs whenlirst applied to 'the container is illustrated in dotted lines in Fig. 5.

The next step consists in securing together the corresponding ends o'l" the two sets of springs. rthis is done by bending the outer portions ofthe springs toward the container ,are

by applying sufficient external pressure, by means of a press, or otherwise, to overcome the resiliency ot' the springs. While the springs are held flat against opposite sides oi?. the. container by the external pressure applied, the outer end of the spring 50, 5l are securedto the outer ends ot the springs 60, 6l by means or shackles 56. 'lhe external pressure may then be released and the parts will retain the position illustrated in Fig. 5. lt will be noted that when in this position the springs exert an inward pressure upon opposite sides of the container. lt shouldbe noted also that each spring is slightly longer than the diameter of the container so thatI a clearance is allowed between the shackles 56 and the periphery the container.

rl`he next step in making the extinguisher consists in filling the container with carbon tetrachloride or a liquid containing carbon tetracl'iloride or other lire extinguishing liquid. Before this is done, however, the handle Ll() should be applied `to the valve stem 35. The lilling is accomplished by` connecting the valve stein 35 .with a supply of liquid under pressure and opening the valve 2b by screwing the valve stein inwardly in the valve body. rl`he liquid may be supplied through a pipe having an internal thread at itsouter endand. the thread 39 of the valve stein may be screwed into this pipe by turning the handle 40 which at the same time screws the valve. stern. inwardly inthe valve body, openingthe valve. The liquid under pressure passes through the bore ot' the valve stem 35 through the lateral openings 3T between the seat 32 and the conical portion 3G and enters betweenthe pieces l0, 20. The liquid forces the two sides of the container apart, bending each of the springs in the reverse direction from its normal curvature. wWhen the desired quantity ot liquid has been introduced the supply of liquid is cut 0H and the valve steam 35 is screwed outwardly, closing the valve and disconnecting1 the valve stem from the liquid supply. The extinguisher. then has the Ytorni shown in F l, 2 vand G. It should bc noted that as the springs are bentduring the lilling oir' the container the outer ends ot the springs are drawn inwardly toward the periphery of the container. The` clearance allowed between the shackles b5 andthe periphery 01"' the` container when the container Ais empty and the springs straight is,however, made sufliciently large so that the shackles do not strike the periphery oit the container until the container is completely filled.

After the container has `been lled,the liquid therein is retained constantly under pressure by the resiliency of the springs which tend to press opposite walls ot the container inward. ln order to use the extinguisher it is merely necessary to turn the handle l0 so as to open the valve 28 aud IUT:

lla

et their ends` the normal torni oit said springs being such that the middle portions of the springs are urged touulud eeeh other by the resiliency oif the springs.

12A tire extii'iguisher, comprisingthe combination ot a container formed of two eoneentrieally eorrugjuted pieces ot sheet metal secured together ut their peripheries, and u pair of normally curved springs extending across the` Container upon opposite sides thereof With their normally convex sides inward und eouneeted together at their ends hy ineens which spaced outwardly troni the periphery ot the Container when the springs are held substantially straight.

13. A tire extinguisher, comprising; n container Consisting of two Circular pieces ot sheet metal eoneentrieally Corrugated und secured together about their peripheries, u plurality of springs disposed dieinetrienlly oit said container :it one side thereof und secured to said container at their iniddles, e plurality of corresponding); springs disposed diametrically at the other side oi' the een miner, and. means eoni'ieetine' the ends ot the springs upon one side of the Container to the ends of the corresponding;` springs upon the other side oit the container und spaced outwardly troni the periphery oi the Container when the Container is einpt-y.

lin a tire extinguisher. the combination ot' u tlexihle container und e. pair of here disposed on opposite sides of the container with their ends secured together. one ot seid bars being;- resilient und adapted to pinch the conte-liner het\voen it and the other har.

l5. tu a tire extinguisher, the eoi'nliineition o'l e. container forined ot two pieces oit Sheet int-tail secured together at their perigheries, one of Suid pieces Consisting of llexihleslieet nietel und being` eoneeutriefilly eorruguted, und n puir of hars extei'ldine across the eon tainer on opposite sides thereoic and secured together :it their ends, one of suid hers beingF resilient und adapted to pinch the container between it and 'the other hm'.

in testimony whereof l here hereunto set. my hund. 

